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X-RAY HOLE [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2023-08-03

English

Subject field(s)
  • Optical Instruments
  • Medical and Surgical Equipment
CONT

Aperture diaphragm : is the simplest type of beam restricting device. It consists of a sheet of lead with a hole in the center that determines the size and shape of the beam and attaches directly to the x-ray tube.

French

Domaine(s)
  • Instruments d'optique
  • Équipement médico-chirurgical

Spanish

Campo(s) temático(s)
  • Instrumentos ópticos
  • Equipo médico y quirúrgico
Save record 1

Record 2 2010-06-14

English

Subject field(s)
  • Tomography
CONT

Procedure to test fulcrum accuracy using the lead aperture plate : The lead aperture plate is positioned 5 cm above the table top using a stable spacing device with the hole centered to the central ray of the X-ray field.... If the fulcrum is accurate the resultant film should show a single round pinhole density.

French

Domaine(s)
  • Tomographie
CONT

Évaluation de l'importance de plusieurs facteurs qui dégradent l'image d'un fantôme simple dans un système tomographique et comparaison du degré de dégradation dans deux systèmes tomographiques, à centre de rotation réglable et à centre de rotation fixe.

Spanish

Save record 2

Record 3 1985-05-28

English

Subject field(s)
  • Astronomy
  • Astrophysics and Cosmography
  • The Stars (Astronomy)
OBS

X-ray binary. The most common type of luminous galactic x-ray source, involving a close binary system in which gas flows(via the inner Lagrangian point) or blows(by a strong stellar wind) from a normal nondegenerate star on to a compact companion. For the most luminous sources,... this companion is probably a neutron star or black hole;...

French

Domaine(s)
  • Astronomie
  • Astrophysique et cosmographie
  • Étoiles (Astronomie)
OBS

Ultérieurement, l'étoile à neutrons n'est quasiment pas détectable. De pareils systèmes d'étoiles brillantes avec un compagnon compact sont appelés des "systèmes dormants".

Spanish

Save record 3

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